Add fab button for sorting group items

[lgjint]

For the updateExpand function, when I click on the fab button to update the sorting mode, the value of group.isExpand is not consistent with Libbox.newStandaloneCommandClient().setGroupExpand(group.tag, isExpand). This causes the expand state of the group to change back to its original state.

sing-box-for-android/app/src/main/java/io/nekohasekai/sfa/ui/dashboard/GroupsFragment.kt

Lines 186 to 191 in e20fa63

	private fun updateExpand(isExpand: Boolean? = null) {
	val newExpandStatus = isExpand ?: group.isExpand
	if (isExpand != null) {
	GlobalScope.launch {
	runCatching {
	Libbox.newStandaloneCommandClient().setGroupExpand(group.tag, isExpand)

The group.isExpand is synchronized by adding the following line, but I'm not sure if this is the behavior you want for the function

https://github.com/lgjint/sing-box-for-android/blob/74177358ed9f7ed0bde8187b81a84566a28da9d3/app/src/main/java/io/nekohasekai/sfa/ui/dashboard/GroupsFragment.kt#L201

Preview:

add-sort-button.mp4

[nekohasekai]

Doesn't this conflict with material design?

[lgjint]

Doesn't this conflict with material design?

I'd close this PR if you think it violates material design.

Perhaps a better solution would be to add a sort button next to the urltest button for each group.

But that might require adding logic to libbox to store the sortMode or adding an extra group table to the database?

[lgjint]

Refer to Material Design Document, I put the sort button above the service start/stop button and adjusted it to the small fab style.

Preview:

add-sort-button-new.mp4